Can aluminum siding be painted? Yes!

Exterior painting includes the painting of various surfaces. It is generally known that we can paint PVC and stucco, but what about aluminum sheets: can aluminum be painted? Yes! Here is how to do it.

The method used

The method which best suits aluminum sheets outdoors painting is the spray painting gun. This technique has great advantages.

Advantages of the spray painting gun

Spray painting allows a productivity 20 times better than the traditional brush and roller. Moreover, for the corrugated surfaces such as aluminum sheets, the paint will enter properly in all the nooks and crannies without any dripping, so the finish will impeccable.

Where can we see aluminum sidings?

Aluminum sidings, commonly called aluminum sheets, can be seen on garage doors, exterior walls (warehouses and commercial buildings), roofs, flashings, soffits, pillars, banisters, balconies, stairs, shutters and gutters. We see them everywhere in Montreal.

Which paint should we use to paint aluminum?

There are dozens, hundreds of paint products on the market which have been specially conceived to paint aluminum surfaces. The trick is to choose an exterior paint (that will resist to the Quebec climatic conditions) and which will adhere well to this kind of metal. We usually use the Aura paint from Benjamin Moore, which offers an excellent adherence as well as a great durability. Other products are less expensive, but the result won’t be optimal in the long run.

Which paint technique is the most appropriate to paint an aluminum wall?

The spray paint gun is the best way to go for aluminum painting, be it for an undulated or a flat surface. Indeed, the spray gun, also called paint gun, allows the application of an even coat which has the perfect thickness. This tool is faster than the brush and roller combo because it sprays paint particles in all the cracks, bumps and holes evenly, when the painter previously followed the required training course, that is!

What to do if it is rusty

If an aluminum sheet is rusty, we can either change it completely or give it a rustproof treatment. If the sheet is damaged to the point where it is weak, we recommend to replace it with a new one. On the contrary, if the surface is still pretty strong, it is possible to simply sandblast it before spreading a rust annihilator, and then to paint over it using a specially conceived anticorrosion paint.

Surfaces of multiple stories and roofs made of aluminum

Your aluminum siding covers a very large surface, or is very tall, or maybe it’s a roof? No problem! FinDecor’s team is equiped with 2 pressure washing machines, 3 elevating platforms, 6 spray guns and numerous safety harnesses. Everything to be efficient!

Anticorrosion treatment

Depending on the condition of the aluminium sheet, it may be better to replace a few aluminum sheets before painting them. The construction painter will tell you what’s what when estimating your project. If the replacement of rusty sheets is not justified, we will proceed to an anticorrosion treatment. It divides in various steps.

  1. Sandblasting allows you to remove the rust and other dirt on the surface.
  2. Pressure washing makes the surface smooth, clean and adherent.
  3. The rust annihilator protects the metal from more rust.
  4. The primer optimizes the paint adherence.
  5. The antirust paint will be applied in one or two coats for a nice finish.


The painting of a new sheet of aluminum siding is guaranteed for 15 years. Obviously, if the condition of the siding is not optimal, the length of the warrantee will be shorter. In most cases, a rusty aluminum wall on which we perform antirust treatment will have a warrantee of 5 to 10 years. Please always refer to your service contract for your warrantee. The lenght may differ.


Please note there is a difference between the warrantee’s term and the paint’s durability. Depending on the surface initial state and the products used, the paint on an aluminum siding can easily last 25 years.

To learn more about the dangers of the spray painting gun, I suggest you to read this post Using a spray Painting Gun for House Painting: dangerous?

To make a reservation of painting services done by a team of pros, please contact us.

Aluminum Siding Painters Donnacona, Port Neuf | Repainting Your Siding Montreal

Dave Beaupre

Master painter